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首页> 外文期刊>Environmental Monitoring and Assessment >Characterization of radionuclide activity concentrations and lifetime cancer risk due to particulate matter in the Singrauli Coalfield, India
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Characterization of radionuclide activity concentrations and lifetime cancer risk due to particulate matter in the Singrauli Coalfield, India

机译：印度单林煤田颗粒物质引起的放射性核素活性浓度和寿命癌症风险的表征

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摘要

In this study, the activities of K-40, Pb-210, Th-232, U-234, U-235, and U-238 in size-segregated particulate matter (PM) were measured in the Singrauli Coalfield, India. Different isotopic compositions were found relative to natural uranium ratios. The radioactivity concentration ratios in different PM sizes [PM2.5, PM10, and suspended particulate matter (SPM)] suggested that anthropogenic sources affected the uranium isotopic compositions in the area. A different isotopic composition from the natural uranium composition was found. The correlation coefficients between the measured isotopes (K-40, Pb-210, Th-232, U-234, U-235, and U-238) and meteorological factors were calculated. PM emissions were affected by the meteorological conditions, which in turn, influenced the U and Th concentrations in PM. The Th-232/U-238 activity ratio in particulate matter was between 0.20 and 1.54 with an average value of 0.9 0.5, 0.2 to 1.1 (0.8 0.7), and 0.2 to 1.2 with an average value of 0.8 0.8 in PM2.5, PM10, and SPM, respectively. These range were quite different from the average crustal ratio of 3.5, indicating that the U-238 concentrations were elevated in this region relative to Th. However, compared with Th, the dose contribution of U to the public was negligible. The average effective dose in public owing to inhalation of natural radioactive K-40, Pb-210, Th-232, and U-234, U-235, and U-238 in the atmosphere was between 0.03 and 327 nSv year(-1). These doses associated with the inhalation of particulate matter were lower than world airborne reference value as reported by UNSCEAR (2000a).
机译：在该研究中，在印度的单林煤田中测量K-40，Pb-210，Th-232，U-234，U-235和U-238的u-234，U-235和U-238的活性。发现不同的同位素组合物相对于天然铀比。不同PM尺寸的放射性浓度比[PM2.5，PM10和悬浮颗粒物（SPM）]表明人为源影响该地区的铀同位素组合物。发现来自天然铀组合物的不同同位素组合物。计算测量同位素（K-40，PB-210，Th-232，U-234，U-235和U-238）和气象因子之间的相关系数。 PM排放受到气象条件的影响，气象条件又影响了PM中的U和Th浓度。颗粒物质中的Th-232 / U-238活性比在0.20和1.54之间，平均值为0.9 0.5,0.2至1.1（0.8 0.7），0.2至1.2，平均值为0.8 0.8， PM10和SPM分别。这些范围与平均地区3.5的平均地壳比相差，表明U-238浓度相对于TH在该区域升高。然而，与TH相比，你对公众的剂量贡献可以忽略不计。由于吸入天然放射性K-40，PB-210，TH-232和U-234，U-235，U-235和U-238，在大气中的平均有效剂量为0.03和327 nsv年（-1 ）。与未经接受（2000A）报道的颗粒物质中吸入颗粒物质相关的剂量低于世界空气中参考值。

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